linux-kernel - [PATCH 2/9] crypto: engine: get rid of cur_req

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Message-Id: <20200122104528.30084-3-clabbe.montjoie@gmail.com>
Date:   Wed, 22 Jan 2020 11:45:21 +0100
From:   Corentin Labbe <clabbe.montjoie@...il.com>
To:     davem@...emloft.net, herbert@...dor.apana.org.au,
        mripard@...nel.org, wens@...e.org, iuliana.prodan@....com
Cc:     linux-arm-kernel@...ts.infradead.org, linux-crypto@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-sunxi@...glegroups.com,
        Corentin Labbe <clabbe.montjoie@...il.com>
Subject: [PATCH 2/9] crypto: engine: get rid of cur_req_prepared

Since we want cryptoengine to support handling more than one request, we
need to remove cur_req_prepared.
It is used only to choose if we need to unprepare() in
crypto_finalize_request().
This choice is needed only in case of error, so let's handle error
without crypto_finalize_request.

Signed-off-by: Corentin Labbe <clabbe.montjoie@...il.com>
---
 crypto/crypto_engine.c  | 17 ++++++++++-------
 include/crypto/engine.h |  2 --
 2 files changed, 10 insertions(+), 9 deletions(-)

diff --git a/crypto/crypto_engine.c b/crypto/crypto_engine.c
index feb0d82dd454..dfcb00e92e09 100644
--- a/crypto/crypto_engine.c
+++ b/crypto/crypto_engine.c
@@ -36,7 +36,7 @@ static void crypto_finalize_request(struct crypto_engine *engine,
 
 	if (finalize_cur_req) {
 		enginectx = crypto_tfm_ctx(req->tfm);
-		if (engine->cur_req_prepared &&
+		if (enginectx->op.prepare_request &&
 		    enginectx->op.unprepare_request) {
 			ret = enginectx->op.unprepare_request(engine, req);
 			if (ret)
@@ -44,7 +44,6 @@ static void crypto_finalize_request(struct crypto_engine *engine,
 		}
 		spin_lock_irqsave(&engine->queue_lock, flags);
 		engine->cur_req = NULL;
-		engine->cur_req_prepared = false;
 		spin_unlock_irqrestore(&engine->queue_lock, flags);
 	}
 
@@ -118,7 +117,7 @@ static void crypto_pump_requests(struct crypto_engine *engine,
 		ret = engine->prepare_crypt_hardware(engine);
 		if (ret) {
 			dev_err(engine->dev, "failed to prepare crypt hardware\n");
-			goto req_err;
+			goto req_err2;
 		}
 	}
 
@@ -129,9 +128,8 @@ static void crypto_pump_requests(struct crypto_engine *engine,
 		if (ret) {
 			dev_err(engine->dev, "failed to prepare request: %d\n",
 				ret);
-			goto req_err;
+			goto req_err2;
 		}
-		engine->cur_req_prepared = true;
 	}
 	if (!enginectx->op.do_one_request) {
 		dev_err(engine->dev, "failed to do request\n");
@@ -146,7 +144,13 @@ static void crypto_pump_requests(struct crypto_engine *engine,
 	return;
 
 req_err:
-	crypto_finalize_request(engine, async_req, ret);
+	if (enginectx->op.unprepare_request) {
+		ret = enginectx->op.unprepare_request(engine, async_req);
+		if (ret)
+			dev_err(engine->dev, "failed to unprepare request\n");
+	}
+req_err2:
+	async_req->complete(async_req, ret);
 	return;
 
 out:
@@ -398,7 +402,6 @@ struct crypto_engine *crypto_engine_alloc_init(struct device *dev, bool rt)
 	engine->rt = rt;
 	engine->running = false;
 	engine->busy = false;
-	engine->cur_req_prepared = false;
 	engine->priv_data = dev;
 	snprintf(engine->name, sizeof(engine->name),
 		 "%s-engine", dev_name(dev));
diff --git a/include/crypto/engine.h b/include/crypto/engine.h
index 7e7cbd9ca3b5..4d8a2602c9ed 100644
--- a/include/crypto/engine.h
+++ b/include/crypto/engine.h
@@ -23,7 +23,6 @@
  * @name: the engine name
  * @busy: request pump is busy
  * @running: the engine is on working
- * @cur_req_prepared: current request is prepared
  * @list: link with the global crypto engine list
  * @queue_lock: spinlock to syncronise access to request queue
  * @queue: the crypto queue of the engine
@@ -43,7 +42,6 @@ struct crypto_engine {
 	char			name[ENGINE_NAME_LEN];
 	bool			busy;
 	bool			running;
-	bool			cur_req_prepared;
 
 	struct list_head	list;
 	spinlock_t		queue_lock;
-- 
2.24.1